/r/OutOfTheLoop - Have you ever seen a whole bunch of news stories/reddit posts/videos or anything else about some topic and you had no idea what everyone was going on about? Here is where can ask what it is all about!

/r/Serendipity - a meta-subreddit meant to broaden the perspective of its subscribers. It takes a popular entry from a random subreddit and posts it every few hours.
If you want to increase your exposure to niche subreddits, or just your perspective on things on the web in general, serendipity might help you do that. But it might not. It's a bot, after all.

/r/TellReddit - Feel like telling everyone something but don't want to do an AMA? Then this is the subreddit for you!

No one appreciates his music. It's sad, it really is. I thought some people would atleast acknowledge his newest album that came out this July.

When I saw Justin Bieber won, I started crying and screaming 'NO'. Gangnam Style coming on after made it worse (yeah, I love JPop and KPop, but Gangnam Style is really overexposed. It makes me sick how people I hate loves that song but still makes fun of me for listening to KPop. THAT MAKES NO SENSE.)

I also cried when I saw Linkin Park perform

It's a shame what happened to them, they used to be so good but when they performed Burn it Down... It was pop garbage.

And Chester sounded terrible (he sounded fine when I was outside of one of the Linkin Park concerts in the summer).

Once you go pop, you're voice gets terrible.

I watch these award shows every time they're on, and forget about how upset I get.